Marketable Securities - Investment Income (Loss) (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 27, 2025 |
Dec. 28, 2024 |
Dec. 30, 2023 |
|
| Investment income | |||
| Investment income (loss) | $ 10,300 | $ 18,600 | $ 9,500 |
| Equity Securities, FV-NI, Unrealized Gain (Loss) [Abstract] | |||
| Unrealized gain (loss) on equity securities | 1,313 | 1,020 | $ (275) |
| Selling in equity securities | 7,200 | ||
| Selling in corporate and municipal bonds | 24,400 | ||
| Realized capital gains | 6,000 | ||
| Equity securities | 0 | 5,930 | |
| Marketable securities | $ 97,091 | $ 191,971 | |
| X | ||||||||||
- Definition Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount of unrealized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount after accretion (amortization) of discount (premium), and investment expense, of interest income and dividend income on nonoperating securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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| X | ||||||||||
- Definition Amount of investment in marketable security. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of cash inflow from sale of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of cash inflow from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as investing activity. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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